Updates CacheConfig.TriedbConfig return type since CacheConfig.triedb…

…Config return type changed.

core/blockchain.go

@@ -159,7 +159,7 @@ type CacheConfig struct {
 }
 
 // arbitrum: exposing CacheConfig.triedbConfig to be used by Nitro when initializing arbos in database
-func (c *CacheConfig) TriedbConfig() *trie.Config {
+func (c *CacheConfig) TriedbConfig() *triedb.Config {
 	return c.triedbConfig()
 }